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Senior LLM Engineer / AI Engineer – Cheshire 

My client is a fast-growing AI technology company building intelligent systems deployed in real-world, safety-critical environments. Their solutions combine advanced AI, data, and edge technologies to support decision-making and reduce risk in high-hazard industrial settings.

They are now looking to hire a Senior LLM Engineer to help design and deliver large language model–powered capabilities across internal platforms and customer-facing products.

This is a hands-on, production-focused role for someone with strong real-world LLM experience, not a purely research or experimental background.

The Role

You will:

Design, build and deploy LLM-driven features into live products and platforms

Work with both commercial and open-source LLMs, selecting the right model for each use case

Build and optimise RAG pipelines, embeddings and vector-based retrieval solutions

Develop APIs and services that integrate LLMs with existing AI, data and platform systems

Optimise solutions for performance, reliability, latency and cost

Collaborate with engineering, AI and product teams to identify and deliver high-value use cases

Ensure all solutions meet security, compliance and data governance standards

What My Client Is Looking For

Essential

Proven experience deploying LLMs in production

Strong Python development skills

Hands-on experience with:

Prompt engineering and evaluation

Retrieval-Augmented Generation (RAG)

Embeddings and vector databases (e.g. FAISS, Pinecone, Weaviate, Chroma)

Experience building LLM-backed services using FastAPI / Flask or similar

Strong understanding of trade-offs around accuracy, latency, cost and scalability

Highly Desirable

Experience working with or fine-tuning open-source LLMs

Familiarity with LLMOps (monitoring, evaluation, guardrails, versioning)

Experience integrating LLMs into complex or data-heavy systems

Docker and Linux experience

Background in regulated, industrial or safety-critical environments

The Right Mindset

Pragmatic, delivery-focused and comfortable working with ambiguity

Able to translate complex AI concepts into practical solutions

Confident owning problems end-to-end, from idea through to deployment

Motivated by building AI that has real-world impact

Why Apply?

High-impact role with real ownership

Opportunity to shape how LLMs are used in production environments

Work on meaningful, technically challenging problems

Collaborative engineering culture within a scaling business

Interested? Please Click Apply Now!

Senior LLM Engineer / AI Engineer – Cheshire